FB Ads Account getting Flagged

Hi,
I have no problem in adding a debit card in m fb ad account but every time i add a phone number in my fb account my ad account will get flagged is this standard procedure from FB that their asking for an ID?Your ads account has recently been flagged because of unusual activity. For security reasons, any ads you're running will be paused until you can confirm your account information by

this is the 2nd time happen to me if i add a phone number it will get flagged.
i have no problem in adding a debit card i just want to add a phone number if it will increase the daily spending in 250.
All information in debit card correct

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